Refrigerating apparatus.



No. 761,701. A PATBNTED JUNE 7, 1904,

G. G. PALMER.

RBPRIGBRATING APPARATUS. APPLIOATIN FILED AUG, 22, 1903. No Monm.. 2SHEETS-snm 1.

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PATENTED JUNE 7, 1904.

c. c.y PALMER. RPPRIGPRATING APPARATUS.

APPLIOATION FILED AUG. 22, 1803.

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reza ai Cif-WSC 77444K? refrigerating apparatus embodyingmy invention.

' ing Apparatus, of which specication.

My invention relates `to improvements in refrigerating apparatus; and itconsists of cer-4 'tain novel features, which will be particularlyYpointed out in the claims concluding this speci- "cation tion. -fusibleplug connected with the safety-valve.

Patented June 7, 1904.

UNITED STATES PATENT OFFICE.

CASSIUS CLAY PALMER, OFNEW YORK, N. Y., ASSIGNOR TO RAILWAY ANDSTATIONARY REFRIGERATING COMPANY, A CORPORATION OF DELAWARE.

REFRIGEBATING APPARATUS.

- SPECIFICATION forming part of LettersxPatent No. r761,701, dated June"1', 1904.

Application filed August 22, 1903. Serial No. 170.392. (No model.)

`citizen of the United States, and a resident of the city of New-York,borough of Manhattan,

county and State of New York, have invented a new and yusefulImprovement in Refrigeratvthe following is a The accompanying drawingsillustrate my invention in the form which is at present preferred by me,although it will be understood made without departing from the spirit ofmy invention.

that various changes and modifications may bel Figure 1 shows alongitudinal section of a` Fig. 2 is a longitudinal section of one ofthe safety-valves employed in my inven- Fig. 3 is a longitudinal topviewof a Ais the machinery-room; B, the refrigerat-` ving-room; C, thepartition separating the two rooms.

the refrigerator; G, the feed-valve.

1 is a pipe leading from the compressor to` the condenser, 2 a pipe fromthe condenser to 'the refrigerator, and 3 a pipe from the refrigv exceptunder great pressure (seventylive 4. is a pipe leading from'the pipe 1to pipe' erator vback to the compressor.

3. This constitutes a by-pass past the comcompression side. In this pipeare placed the safety-valves 5 and 6, each being provided. with afusible plug ,11 and 12, also the ordi-l plug 11; but it will beunderstood that the same description is applicable to valve 6 and plug12. The seat a for the valve 5 is secured 'pressor connecting theexhaust side with thev I will refer to the valve 5 and vforced out, andthus release the valve 5.

to a hollow section which is screwed into the valve-case. The other end,b,.of this piece is connected to the branch 4L of the pipe 4. The valveis held to its seat Aby means of the pin 13 and spring 14. The outer endof the pin 13 lits in a hollow cylinder 15, which extends through thevalve-case. A washerl fits over the end of the cylinder within the ease.The .spring 14. bears against the` opposite side of this washer.. Theother end of the cylinder 15 is cut away on two sides, and the tipsthereof are grooved toreceive one end of the fusible plug 1.1. The otherend of the fusible plug rests in a groove in the piece 17, which is heldin place by means of a pin 18, secured to the head 19, which is fastenedto the valve- The fusible plug 11 is composed of two pieces 0 and Eachpiece is cut away through a portion of its center. Thetwo are thenplaced together, so that their ends which are not cut away overlap.v Thecut-away portions are then filled with solder andthe two pieces aresecured. The valve 5 is placed in the section of the pipe 4 in themachineryroom, while the valve 6 is in the refrigerating-room. From thevalve 5 the pipe 8 and from valve 6 the pipe 9 leads into the pipe 10,which has an outlet exterior to the refrigerating apparatus. The objectof these valves is to prevent the possibility of an explosion in theevent of a fire occurring in lthe vicinity of the refrigeratingapparatus.

The valves 5 and 6 do not become operative pounds to square inch) orgreat heat, (2000.) Should a lire occur in the compartment A and theheat reach the degree indicated above or should the pressure in theapparatus reach the number of pounds indicated, the fusible plug 11would melt, or the spring located between fusible plug and valve-seatwould be By the release of this valve the pressure in the pipe 4: willbe released and escape into the open by meansof the pipes 8 and`10. Therelease of pressure in the pipe 11 will release the checkvalve 7, whichis held in place by the pressure in the pipell and will open the valve 7and allow the chemical in the pipe 3 to escape through l denser, arefrigerator, pipes connecting all of the valves 7 and 5 and pipes 8 and10 to the street. Similarly, if a fire occur in the refrigerating-room Band the heat or pressure be great the fusible plug 12 in the valve 6will be melted or forced out, and thereby release the valve 6, and thepressure in the pipe 4: will exhaust through the pipes 9 and lO. Here,as before described, the release of pressure will open the valve 7 andallow escape from the pipe 3. Thus in or near whichever compartment ofthe refrigerating apparatus a fire may occur the effect will be torelieve the pressure in both the condenser and the refrigerator.

In the operation of the apparatus the condenser is under pressure andthe refrigerator is either under very light pressure or partial vacuum.Consequently the pipe 4, connecting pipes l and 3, would be means of adirect circuit which would equalize the pressures in both the condenserand the refrigerator unless a means of preventing it be adopted, whichis done by the cheek-valve 7. This allows the pressure to exist up tothe top4 of the seat of the valve 7, but prevents any circulation pastthat point. At the same time it provides a means of exit in case thechemical in the refrigerator F becomes at any time in excess of thepressure in the balance of the apparatus, as would be the case were afire to occur in the refrigerating-room. By this construction the entirecontents of the refrigerating apparatus is released by either theoperation of valves 5 or 6, making it a complete protection for allparts of the machine.

WV hat I claim as new, and desire to secure by Letters Patent, is-

l. In combination in a refrigerating apparatus, the compressor, thecondenser, the refrigerator, pipes connecting the same, a bypass pipepast the compressor, one or more safety-valves and a check-valve in saidby-pass pipe.

2. In a refrigerating apparatus consisting of two compartments incombination, a compressor, acondenser, arefrigerator, pipes connecting'the same, a by-pass pipe past the compressor, a plurality ofsafety-valves and a check-Valve in said by-pass pipe, one safetyvalvebeing located in each compartment.

8. In a refrigerating apparatus comprising a machinery-chamber and arefrigeratingchamber, in combination a compressor, acondenser, arefrigerator, pipes connecting all of the same, a by-pass pipe past thecompressor running through both of said chambers, a check-valve in saidpipe and two safety-valves, one safety-valve being located in eachchamber.

4. In a refrigerating apparatus comprising a machinery-chamber and arefrigeratingchamber, in combination a compressor, a conthe same, aby-pass pipe past the compressor` said by-pass pipe passing through bothof said chambers, a safety-valve in each (.fhamber located in saidby-pass pipe, a check-valve also in said by-pass pipe, saidcheel\'-\'alve being within the refrigeratiug-clianil)er and beingadapted to open and release the pressure in the apparatus on the releaseof either safetyvalve.

5. In a refrigerating apparatus in combina.- tion with the compressor,condenser, refrigerator and pipes connecting all of the same, a

by-pass pipe past the compressor, two safetyvalves in said pipe, saidsafety-valves being provided with fusible plugs adapted to melt or beforced out by high temperature or great pressure, a check-valve also insaid liv-pass pipe, said check-valve being held to its seat by pressurein the by-pass pipe and being adapted to open on the release of eithersafety-valve and thereby relieve the pressure in the whole apparatus.

6. In a refrigerating apparatus comprising a machinery-chamber and a.refrigeratingchamber, in combination with thecompressor, condenser,refrigerator and pipes eonnmfting all of the same, a by-pass pipe pastthe compressor,two safety-valves in said by-pass pipe, one safety-valvebeing located in eaeh chamber, said safety-valves being provided withfusible plugs adapted to meltor be forced out by high temperature orgreat pressure, a. check-valve also in said by-pass pipe, saidcheck-valve being` located in the section of the pipe near therefrigerator, .and being held to its seat by pressure in the by-passpipe and being adapted to open on the release of the safety-valve ineither chamber and thereby relieve the pressure in the whole apparatus.

7. In a refrigerating apparatus in combination with the compressor,comlenser, refrigerator and pipes connecting all of the same, a by-passpipe past the compressor, one or more safety-valves in said by-passpipe', said valve or valves being provided with a spring and a fusibleplug, said springand plug being' adapted to be forced out or to melt outat great pressure or high temperature, a check-valve also in saidby-pass pipe, said check-valve being held to its seat by the pressure inthe by-pass pipe and being adapted to open on the. release of either oneor more of said safety-valves and thereby relieve the pressure in thewhole apparatus.

vln testimony whereof l have hereunto signed my name in the presence oftwo subscribing witnesses.

CASSIUS CLAY .lUUnWllClt lVitnesses:

E. F. Pon'rnn,

U/rim A. PAULlNu.

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